Manufacture of warp beams



Dec. 14, 1937.

F. MOSSBERG 2,102,020

MANUFACTURE OF WARP BEAMS or inal Filed Aug. 29, 1933 INVENT'OR.

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Patented Dec. 14, 1937 UNITED STATES PATENT OFFICE MANUFACTURE OF WARPBEAMS Frank Mossberg, Attleboro, Mass., assignor to Mossberg PressedSteel Corporation, a corporation of Massachusetts Original applicationAugust 29, 1933, Serial No. 687,291. Patent No. 2,027,749 dated JanuaryDivided and this application June 13, 1934, Serial No. 730,440

8 Claims.

extending longitudinally of the beam which will be of such shape thatthe rod for holding the warp threads in position may be readily retainedtherein.

Another object of the invention is a method by which a substantiallysquare cornered groove extending longitudinally of the beam for thereception of warp threads and a binding rod, may be formed in a metalbeam.

Another object of the invention is to overcome the disadvantages presentin the rolling-in of a groove in a continuous tubular beam by making thebeam in two parts so that there may be a groove formed in the sheetstock for one. of the parts and then subsequentlysecuring these twoparts together in the desired assembled barrel formation.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described, andparticularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is an elevation of the beam, showing heads mounted thereon andwarp threads as positioned in their initial positions on the beam.

Fig. 2 is a section on line 2-2 of Fig. 1. Fig. 3 is a perspective viewillustrating two parts of the beam barrel just prior to assembly.

Fig. 4 is a perspective view illustrating the parts secured togetheralong their edges by welding.

Fig. 5 is a sectional view illustrating the first step forming thelongitudinal groove, as shown in Figs. 3 and 4.

Fig. 6 is a similar view showing the second step in the operation offorming the longitudinal groove, as shown in Figs. 3 and 4.

Fig. 7 is a perspective view of one of the parts of a modified form ofbeam.

Fig. 8 is a perspective view of the other part of a modified form ofbeam.

Fig. 9 is a sectional view illustrating the assembly of the parts asshown in Figs. 7 and 8.

Fig. 10 is a sectional view illustrating a somewhat difierent assembly,that is the channel edges being formed abutting on the inner surface ofthe beam barrel.

Fig. 11 is a perspective view of the disc used for securing the channelin position.

In the formation of warp beams with longitudinally extending groovestherein, it has been usual to. make such beams of wood and in some caseswhere continuous metal tubes have been used attempts have been made toroll into such metal tube a groove which would receive the warp and rodwhich secures the warp threads in position on the beam. This rollingoperation which has been attempted to form such a groove is notsatisfactory in that square corners cannot be formed to keep the rod inplace and the production following this teaching has been discontinuedas unsatisfactory; and in order that a square cornered groove may beprovided, I have formed the beam barrel in two parts; one part beingitself a channel formation with square corners or in some formations Imay press a groove into the semi-cylindrical portion of the sheet, stockof the barrel, which in the first operation may have rounded corners butby upsetting or forcing outwardly the bottom wall of this channel, I mayin a subsequent operation provide square corners; and the following is amore detailed description of thepreferred means by which theseadvantageous results may be accomplished.

With reference to the drawing, l0 designates generally the barrel of thewarp beam which is provided with heads I I and I2 between which the warpthreads l3 are positioned. These warp threads are held in place in thegroove l4 in the barrel by means of the rod l5,- which is forced intothe groove to hold these warp threads in position. Tension drums l6 areprovided at either end of the beam in which trunnions I! are mounted forthe supporting of the beam in bearings for rotation.

In forming the groove M in one form which I utilize I providesemi-cylindrical parts l8 and I9, each consisting of sheet stock andwhich together provide a cylindrical barrel. These parts are eachpressed into the shape in which they are illustrated in the drawing. Inthe part l8 more stock is provided than in the other part for theformation of the warp securing groove which is formed by forcing thestock at inwardly, as shown in Fig. 5, which provides somewhat roundedcorners 2| and 22. The bottom wall 23 of the inwardly forced stock isforced inwardly to a greater extent than is desired for the depth of thegroove and then in a subsequent operation the bottom wall of this grooveis forced outwardly while at the same time providing square corners 24and 25 with the side walls 26 at right angles to the bottom wall 23 sothat when the rod i5 is inserted, the shape of the groove, designated[4, will be such as to maintain this rod in the desired position. At thesame time pressure is used lit! to form the groove the stock on eitherside of the groove is formed on the arc of a circle.

After the part I 8 is shaped in this manner, the two parts l8 and I9 arepositioned together with their edges abutting and are welded as at 28along either edge so as to provide a. generally cylindrical barrel oftubular formation.

In some instances, I provide my two-part barrel in a diiferent way andas shown in Figs. '7 and 8, I have there provided a part 30 which isbent or formed in any desired manner into a substantially channel shapedstrip having a recess 3| extending longitudinally thereof and providedwith side walls 32 and a. bottom wall 33 which are at right angles toeach other and provide square corners at the juncture of these walls.The other part 34 of my beam is substantially cylindrical or suflicient,with the part 30, to complete the remainder of the cylinder. The spacededges 35 and 36 of the barrel provide a space between them for thereception of the part 30 or channel strip and is welded along the edgeportions of this strip, as at 31, so as to provide a secure joint.

In some instances I may desire to position the channel strip 30 of thebarrel 34 and while they may be welded in this position I prefer toplace a series of notched discs 40 within the tubular barrel with theirnotches snugly receiving the channel strip 30 and then weld the barrelto the disc thru holes in the barrel, which in turn secure the channelstrip in place in the barrel without the channel strip being weldeddirectly to the barrel, and in this case the edges of the walls 32 willabut the inner surface 38 of the tubular barrel 34 and be welded in thisposition or otherwise supported as by notched discs positioned withinthe tubular barrel.

By these methods I provide a two-part beam in which a groove may beformed with right angular walls and square corners which will securelyretain the rod in place.

This application is a division of my prior application, Serial No.687,291, on which a patent has been granted as of the date of January14, 1936, No. 2,027,749.

Having thus described one illustrative embodiment of my invention andthe best mode known to me for carrying out my method, I desire it to beunderstood that although specific terms are employed, they are used in ageneric and descriptive sense and not for the purpose of limitation, thescope of the invention being defined and limited only by the terms ofthe appended claims.

I claim:

1. The method of forming a hollow, tubular warp beam, which consists inproviding two sheet stock parts, forming a channel recess in one partextending longitudinally thereof adapted to receive a warp fastening rodand forming the other part to complete the circumference of a circle andthen welding said two parts together with their edge portions in acontiguous relation.

2. The method of forming a hollow, tubular warp beam, which consists inproviding two sheet stock parts, forming a channel recess in one partwith right angularly extending walls and sharp comers, and forming theother part to complete the circumference of a circle and then weldingsaid two parts together with their edge portions in contiguous relation.

3. The method of forming a warp beam, which consists in providing twoparts, forming one part generally cylindrical with spaced longitudinallyextending edges, forming the other part with a longitudinally-extendingrecess adapted to receive a warp fastening rod, placing the channel'part within the spaced edges of the other part and welding the edges ofthe channel part to the spaced edges of the cylindrical part.

4. The method of forming a warp beam, which consists in providing twoparts, forming one part generally cylindrical with spacedlongitudinallyshaped with a longitudinally-extending recess having rightangularly-extending -walls and adapted to receive a warp fastening rod,welding the edges of the channel part to the spaced edges of thecylindrical part.

5. The method of forming a warp beam, which consists in providing twoparts, forming one part generally cylindrical with spaced longitudinallyextending edges, forming the other part channel shaped and securing thechannel part in position to span said spaced edges by means of a notcheddisc secured to the barrel with the notch receiving the channel.

6. The method of forming a warp beam, which consists in providing twoparts, forming each generally semi-cylindrical in shape, forming alongitudinally extending groove in one part, and welding the edges ofthe two parts together in abutting relation.

7. The method of forming a warp beam, which consists in providing twoparts, each of generally semi-cylindrical shape, pressing alongitudinally extending groove in the outer surface of one part withrounding edges, subsequently providing square corners on said edges andthen Securing said parts together.

8. The method of forming a warp beam, which consists in providing twoparts, pressing one part into semi-cylindrical shape with alongitudinally extending groove in the outer surface thereof, of a depthgreater than desired and then forcing the bottom wall outwardly toprovide square corners and securing the edges of the two parts together.

FRANK MOSSBERG.

